Open {file} in a new tab, or jump to a window/tab containing the file if there is one.

:tab plit

Copy the current window to a new tab of its own.

:tabs

List all tabs.

:tabn

Go to next tab.

:tabp

Go to prev tab.

<c-PgDn>

Go to next tab.

<c-PgUp>

Go to prev tab.

Tab navigation

If the target buffer is already displayed in a window in one of the tabs, that window will be displayed. Otherwise, the current window will be split, and the target buffer will be displayed in the new window.